Nutrition Chapter: Protein Sources and Quality
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Questions and Answers

All proteins contain the same proportion of amino acids.

False

Animal sources are generally recognized as providing high-quality protein.

True

Legumes are considered one of the poorer quality plant proteins.

False

Milk products such as cheese and ice cream derive their protein from vegetables.

<p>False</p> Signup and view all the answers

The digestion of protein occurs through specific processes in the alimentary tract.

<p>True</p> Signup and view all the answers

Pepsinogen is activated by bile salts.

<p>False</p> Signup and view all the answers

Trypsinogen is activated by enteropeptidase.

<p>True</p> Signup and view all the answers

The end products of protein digestion are polypeptides.

<p>False</p> Signup and view all the answers

Chymotrypsinogen is activated by active trypsin.

<p>True</p> Signup and view all the answers

Dipeptides are formed in the stomach during protein digestion.

<p>False</p> Signup and view all the answers

Study Notes

Protein

  • Proteins are crucial structural elements in all body cells
  • Proteins are involved in various functions like enzymes, hormones, and glandular secretions
  • Different foods have varying amounts of the 22 amino acids and their proportions
  • Complete proteins provide all essential amino acids in sufficient quantities and proper ratios for growth and maintenance

Sources of Protein

  • Animal sources (meat, poultry, fish, eggs) are high-quality proteins, containing all essential amino acids
  • Milk and milk products (cheese, ice cream) derive their protein from milk
  • Eggs are a good source of protein and are in a class by themselves
  • Plant sources (vegetables, legumes) are generally lower in protein quality compared to animal sources, but some legumes contain more than 4-6% protein

Protein Quality

  • Animal-based proteins are generally considered complete or high-quality proteins, as they provide all essential amino acids.
  • Milk products are also good quality proteins derived from milk.
  • Legumes offer higher quality plant protein content than other plant-based proteins.

Protein Digestion and Absorption

  • Protein digestion occurs in the alimentary tract.
  • The process is helped by enzymes
  • 7-14% of protein in uncooked grains is important.

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Description

This quiz covers essential concepts related to proteins, including the quality and sources of dietary protein. Explore the differences between animal and plant proteins, as well as the digestion process of proteins in the human body. Test your understanding of protein nutrition.

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